Wire up button events to state task

[issy]

I need to handle the button logic internally to the core application. This requires some event magic in the simulator and the firmware.

I'll figure out the rest later. Probably need another internal channel for "processed" button events that have a bit more flavour (long press, double press, etc)

[issy]

Note

The foundation button task should probably receive simplified events such as "double press", "long press", "single press", etc.
Debouncing et al can be handled in simulator and firmware